BasicsSpec.scala

package com.evolutiongaming.bootcamp.basics

import Basics._
import org.scalatest.flatspec.AnyFlatSpec
import org.scalatest.matchers.should.Matchers._
import org.scalacheck.Arbitrary._
import org.scalatestplus.scalacheck.ScalaCheckDrivenPropertyChecks

class BasicsSpec extends AnyFlatSpec with ScalaCheckDrivenPropertyChecks {
  "allBooleans" should "contain all possible boolean values" in {
    allBooleans.size shouldEqual 2
    allBooleans.reduce(_ && _) shouldEqual false
    allBooleans.reduce(_ || _) shouldEqual true
  }

  "helloMethod" should "work for all strings" in {
    forAll { x: String =>
      helloMethod(x) shouldEqual s"Hello, $x!"
    }
  }

  "helloFunction" should "work for all strings" in {
    forAll { x: String =>
      helloFunction(x) shouldEqual s"Hello, $x!"
    }
  }

  "stringLength" should "work for all strings" in {
    forAll { x: String =>
      stringLength(x) shouldEqual x.length
    }
  }

  "add" should "add 2 and 3" in {
    add(2, 3) shouldEqual 5
  }

  it should "work for all numbers" in {
    forAll { (a: Int, b: Int) =>
      add(a, b) shouldEqual a + b
    }
  }

  "power" should "be correct" in {
    forAll { n: Int =>
      power(2)(n) shouldEqual Math.pow(n.toDouble, 2)
    }

    forAll { n: Byte =>
      power(3)(n.toInt) shouldEqual Math.pow(n.toDouble, 3)
    }
  }

  "allOptionBooleans" should "be correct" in {
    allOptionBooleans.size shouldEqual 3
  }

  "allEitherUnitBooleans" should "be correct" in {
    allEitherUnitBooleans.size shouldEqual 3
  }

  "allEitherBooleanBooleans" should "be correct" in {
    allEitherBooleanBooleans.size shouldEqual 4
  }

  "allTupleBooleanBooleans" should "be correct" in {
    allTupleBooleanBooleans.size shouldEqual 4
  }
}